cirrus: avoid resetting vga dirty logging unnecessarily (Avi Kivity)
cirrus bitblt reset will stop and start dirty logging even when there is no need; this causes full redraws. avoid by only updating memory access when exiting cpu-to-video update mode. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6384 c046a42c-6fe2-441c-8c8c-71466251a162
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@ -850,11 +850,17 @@ static void cirrus_bitblt_cputovideo_next(CirrusVGAState * s)
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static void cirrus_bitblt_reset(CirrusVGAState * s)
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static void cirrus_bitblt_reset(CirrusVGAState * s)
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{
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{
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int need_update;
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s->gr[0x31] &=
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s->gr[0x31] &=
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~(CIRRUS_BLT_START | CIRRUS_BLT_BUSY | CIRRUS_BLT_FIFOUSED);
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~(CIRRUS_BLT_START | CIRRUS_BLT_BUSY | CIRRUS_BLT_FIFOUSED);
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need_update = s->cirrus_srcptr != &s->cirrus_bltbuf[0]
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|| s->cirrus_srcptr_end != &s->cirrus_bltbuf[0];
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s->cirrus_srcptr = &s->cirrus_bltbuf[0];
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s->cirrus_srcptr = &s->cirrus_bltbuf[0];
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s->cirrus_srcptr_end = &s->cirrus_bltbuf[0];
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s->cirrus_srcptr_end = &s->cirrus_bltbuf[0];
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s->cirrus_srccounter = 0;
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s->cirrus_srccounter = 0;
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if (!need_update)
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return;
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cirrus_update_memory_access(s);
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cirrus_update_memory_access(s);
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}
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}
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